Journal CoversThe Advanced Light Source is a third-generation synchrotron light source, one of the world's brightest sources of ultraviolet and soft x-ray beams.http://www-als.lbl.gov/index.php/science-highlights/journal-covers.html
Mon, 03 Aug 2015 00:21:38 +0000Joomla! 1.5 - Open Source Content Managementen-gbThe Crystallization of PEDOT:PSS Polymeric Electrodes Probed In Situ during Printinghttp://www-als.lbl.gov/index.php/science-highlights/journal-covers/1024-the-crystallization-of-pedotpss-polymeric-electrodes-probed-in-situ-during-printing.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/1024-the-crystallization-of-pedotpss-polymeric-electrodes-probed-in-situ-during-printing.htmlOrganic electronics have emerged into a highly interesting field of research with a great variety of applications. P. Müller-Buschbaum and co-workers demonstrate the importance of in situ investigations during the printing process of organic electronics. In situ grazing-incidence wide-angle x-ray scattering is used to follow the crystallization process of highly conductive PEDOT:PSS polymer mixtures. These findings are important for tuning transparent polymeric electrodes for organic electronics. Cover Image by Christoph Hohmann, Nanosystems Initiative Munich (NIM). Article link.]]>LSTamura@lbl.gov (Lori Tamura)Journal CoversThu, 18 Jun 2015 19:53:08 +0000Electronic Structure Changes in Supercapacitor Electrodes Observed In Operandohttp://www-als.lbl.gov/index.php/science-highlights/journal-covers/1000-electronic-structure-changes-in-supercapacitor-electrodes-observed-in-operando.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/1000-electronic-structure-changes-in-supercapacitor-electrodes-observed-in-operando.htmlProfound bias- and time-dependent changes in the electronic structure of graphene-based supercapacitor electrodes are demonstrated under operating conditions via a combination of in operando x-ray spectroscopy and ab initio modeling by J.R.I. Lee and co-workers. The evolution in electronic structure reflects changes in the surface chemistry and morphology induced by polarization of the electrode-electrolyte interface and points to distinct pseudocapacitive and electric-double-layer capacitive channels for charge storage. Article link.]]>LSTamura@lbl.gov (Lori Tamura)Journal CoversTue, 10 Mar 2015 00:58:35 +0000MOF Coating a Promising Path to White LEDs http://www-als.lbl.gov/index.php/science-highlights/journal-covers/998-mof-coating-a-promising-path-to-white-leds.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/998-mof-coating-a-promising-path-to-white-leds.htmlHu et al. designed a new yellow phosphor with high quantum yield by immobilizing a preslected chromophore into the rigid framework of a metal–organic framework (MOF); the structure was determined at Beamline 11.3.1. Coating a blue light-emitting diode (LED) with this compound readily generates white light with high luminous efficacy. The new yellow phosphor demonstrates great potential use in phosphor-converted white LEDs. Article link.]]>LSTamura@lbl.gov (Lori Tamura)Journal CoversSat, 28 Feb 2015 01:11:21 +0000Advances in Lithographyhttp://www-als.lbl.gov/index.php/science-highlights/journal-covers/981-advances-in-lithography.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/981-advances-in-lithography.htmlWork featured on Applied Optics cover from ALS Beamline 11.3.2. Field-dependent wavefront aberration distribution of an extreme ultraviolet single-lens zone-plate microscope, recovered by the gradient descent algorithm customized for partially coherent imaging and targeted for fast and accurate retrieval. For information, see Yamazoe et al., pp. B34–B43, part of the Applied Optics-JOSA A cohosted feature, Advances in Lithography.]]>EJMoxon@lbl.gov (Elizabeth Moxon)Journal CoversTue, 16 Dec 2014 19:40:26 +0000The influence of molecular orientation on organic bulk heterojunction solar cellshttp://www-als.lbl.gov/index.php/science-highlights/journal-covers/919-the-influence-of-molecular-orientation-on-organic-bulk-heterojunction-solar-cells.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/919-the-influence-of-molecular-orientation-on-organic-bulk-heterojunction-solar-cells.htmlWork done on ALS Beamlines 11.0.1.2, 7.3.3, and 5.3.2.2. reveals that preferential orientation of polymer chains with respect to the fullerene domain leads to a high photovoltaic performance. Featured on the cover of Nature Photonics 8. Article link]]>EJMoxon@lbl.gov (Elizabeth Moxon)Journal CoversMon, 28 Apr 2014 17:03:32 +0000Crystal nucleation and near-epitaxial growth in nacrehttp://www-als.lbl.gov/index.php/science-highlights/journal-covers/876-crystal-nucleation-and-near-epitaxial-growth-in-nacre.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/876-crystal-nucleation-and-near-epitaxial-growth-in-nacre.htmlNacre--the iridescent inner lining of many mollusk shells-- has a unique strcuture that is remarkably resistant to fracture. The nacre featured on this cover is from Haliotis laevigatawith average layer thickness 470-nm. The colors represent crystal orientationthe crystal lattice tilts across tablets.left stack all tablets are yellow, hence all aragonite crystals are co-oriented. The central stack shows a color gradient from red to black, thus,. In this PIC-map color represents crystal orientation Read more. ]]>EJMoxon@lbl.gov (Elizabeth Moxon)Journal CoversThu, 12 Dec 2013 21:56:24 +0000Ring Cycle for Dilating and Constricting the Nuclear Porehttp://www-als.lbl.gov/index.php/science-highlights/journal-covers/825-ring-cycle-for-dilating-and-constricting-the-nuclear-pore.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/825-ring-cycle-for-dilating-and-constricting-the-nuclear-pore.htmlPictured is an illustration of several nuclear pore complexes (NPCs) embedded in a cell nucleus. NPCs act as gatekeepers between a cell’s cytoplasm and its nucleus. Based on crystallographic analyses, Sozanne R. Solmaz et al. uncover the molecular mechanism that underlies the large changes in diameter of NPCs and suggest a “ring cycle” mechanism for dilating and constricting the central NPC channel. The model could explain the ability of NPCs to accommodate transport substrates of a large size range and rapidly adjust to cellular transport needs. Read the full article.(Image courtesy of Sozanne R. Solmaz, Günter Blobel, and Ivo Melčák.)]]>Journal CoversThu, 13 Jun 2013 17:30:21 +0000Jamming Behavior of Domains in a Spiral Antiferromagnetic Systemhttp://www-als.lbl.gov/index.php/science-highlights/journal-covers/812-jamming-behavior-of-domains-in-a-spiral-antiferromagnetic-system.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/812-jamming-behavior-of-domains-in-a-spiral-antiferromagnetic-system.htmlUsing resonant magnetic x-ray photon correlation spectroscopy, this research shows that the domains of a spiral antiferromagnet enter a jammed state at the onset of long-range order. This schematic of x-ray scattering is from a spiral antiferromagnet with a spin structure that gives rise to domains with jamming behavior.
]]>Journal CoversTue, 04 Jun 2013 21:34:12 +0000Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigationhttp://www-als.lbl.gov/index.php/science-highlights/journal-covers/794-solar-cells-spin-cast-bulk-heterojunction-solar-cells-a-dynamical-investigation.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/794-solar-cells-spin-cast-bulk-heterojunction-solar-cells-a-dynamical-investigation.htmlSpin-coating is extensively used in the lab-based manufacturing of organic solar cells, including most of the record-setting cells. Aram Amassian and co-workers report in this study the first direct observation of photoactive layer formation as it occurs during spin-coating. The study provides new insight into mechanisms and kinetics of bulk heterojunction formation, which may be crucial for successful transfer to printing processes and scaling up production.]]>Journal CoversWed, 03 Apr 2013 21:32:05 +0000Real-Time Quantitative Imaging of Failure Events in Materials Under Load at Temperatures Above 1,600 °Chttp://www-als.lbl.gov/index.php/science-highlights/journal-covers/791-real-time-quantitative-imaging-of-failure-events-in-materials-under-load-at-temperatures-above-1600dc.html
http://www-als.lbl.gov/index.php/science-highlights/journal-covers/791-real-time-quantitative-imaging-of-failure-events-in-materials-under-load-at-temperatures-above-1600dc.htmlGathering information on the evolution of small cracks in ceramic matrix composites used in hostile environments such as in gas turbines and hypersonic flights has been a challenge. It is now shown that sequences of microcrack damage in ceramic composites under load at temperatures up to 1,750 °C can be fully resolved with the use of in situ synchrotron x-ray computed microtomography. Article (PDF).News and Views (PDF).]]>Journal CoversMon, 25 Mar 2013 08:00:00 +0000